A chief officer who is believed to have fallen overboard from a container ship on Wednesday is considered lost at sea.A Bermuda Maritime Operations spokesman said: “Unfortunately, he has not been found. The US Coast completed search patterns today.“The vessel that the man fell overboard from has continued to search, along with another vessel, but we suspect that darkness tonight will complete any chance of finding him.”The 30-year-old man was reported missing from the MSC Tuscany at 6pm on Wednesday. The ship was on its way from Montreal, Canada to the Dominican Republic.